Foldable Stand Locking Assembly to Prevent Accidental Collapse
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Solution Overview
Problem
Foldable stands and beds with crossed bars are prone to accidental folding and collapse due to inward movement of the bars during use, compromising stability.
Innovation Solution
Incorporation of locking assemblies that selectively lock the pair of crossed bars in the leg assemblies, allowing the stand to fold and unfold when unlocked and preventing accidental folding when locked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If crossed bars are made foldable like an umbrella, then the stand becomes portable and easy to store, but the stand becomes prone to accidental folding and collapse during use
Solution Approach 1:
The locking assembly provides dynamic control over the crossed bars, allowing them to be movable during folding operations and fixed during use. The locking bar can be selectively positioned to lock or unlock the crossed bars, enabling the structure to transition between stable and portable states as needed
Solution Approach 2:
The locking mechanism changes the positional parameter of the locking bar relative to the crossed bars. When the locking bar engages with the crossed bars at specific positions, it prevents inward movement; when disengaged, it allows folding motion, thus controlling the stability state through parameter changes
2Reliability
If locking assemblies are added to prevent accidental folding, then stability is improved, but device complexity increases
Solution Approach 1:
The locking assembly is segmented into distinct functional components: a locking bar with locking portions, a locking hole, and elastic components. This segmentation allows each part to perform its specific function independently while maintaining overall simplicity. The locking bar can engage with different positions on the crossed bars through its segmented locking portions
Solution Approach 2:
The elastic component (spring) provides self-service by automatically pushing the locking bar to engage or disengage from the locking holes based on the state of the crossed bars. This eliminates the need for complex control mechanisms or additional actuators, as the system self-regulates through elastic force
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The locking assemblies provide improved stability by ensuring the crossed bars remain fixed relative to each other, preventing inward folding and collapse of the foldable stand or bed.
Implementation Method 1
at least one locking assembly to selectively lock the pair of crossed bars of the first or second leg assembly, thereby allowing the foldable stand to fold and unfold when unlocked and preventing the foldable stand from accidental folding when locked
Implementation Method 2
An upper end of a first crossed bar in the pair of crossed bars of the first leg assembly is pivotally connected to the first portion of the second support. An upper end of a second crossed bar in the pair of crossed bars of the first leg assembly is pivotally connected to the first portion of the first support
Data Source
AI summary
A foldable stand includes first and second supports, each having first and second portions. The foldable stand also includes first and second leg assemblies, each having a pair of crossed bars. The pair of crossed bars of the first leg assembly is pivotally connected to the first portions of the first and second supports. The pair of crossed bars of the second leg assembly is pivotally connected to the second portions of the first and second supports. The foldable stand further includes at least one locking assembly to selectively lock the pair of crossed bars of the first or second leg assembly to prevent the foldable stand from accidental folding.